Supine Hypotensive Syndrome
Overview
Plain-Language Overview
Supine Hypotensive Syndrome is a condition that occurs when a person lies flat on their back, causing the large vein called the inferior vena cava to be compressed. This compression mainly affects pregnant women, especially in the later stages of pregnancy, because the enlarged uterus presses on the vein. The condition impacts the circulatory system by reducing blood flow back to the heart, which can lead to a drop in blood pressure. Symptoms often include dizziness, lightheadedness, and sometimes fainting. This syndrome can affect the health of both the mother and the baby by decreasing blood flow and oxygen delivery. It is important to recognize because it can cause discomfort and potential complications during pregnancy.
Clinical Definition
Supine Hypotensive Syndrome is a clinical condition characterized by compression of the inferior vena cava by the gravid uterus when a pregnant woman lies in the supine position. This compression leads to decreased venous return to the heart, resulting in reduced cardiac output and subsequent hypotension. The syndrome typically occurs in the third trimester of pregnancy due to the size of the uterus. Major clinical features include hypotension, tachycardia, pallor, and dizziness when supine, which improve upon lateral repositioning. The condition is significant because it can cause maternal symptoms and compromise uteroplacental perfusion, potentially affecting fetal oxygenation. Recognition and management are essential to prevent maternal and fetal complications.
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